[Perl/perl5] 16adbe: work around more

[Yves Orton via perl5-changes]

  Branch: refs/heads/yves/open_stdio_hpux_test_issue
  Home:   https://github.com/Perl/perl5
  Commit: 16adbe90b8fec559aadb09c07a5b58ef7c862f38
      
https://github.com/Perl/perl5/commit/16adbe90b8fec559aadb09c07a5b58ef7c862f38
  Author: Yves Orton <demer...@gmail.com>
  Date:   2023-03-31 (Fri, 31 Mar 2023)

  Changed paths:
    M perlio.c

  Log Message:
  -----------
  work around more